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47mm Glass Vacuum Filter Holder / without Flask, with 300㎖ or 500㎖ Glass Funnel with Fritted Glass- or Stainless-steel Screen Support 진공여과장치/홀다, 여과병은 별도 47mm Glass Vacuum Filter Holder / without Flask, with 300㎖ or 500㎖ Glass Funnel with Fritted Glass- or Stainless-steel Screen Support 진공여과장치/홀다, 여과병은 별도 47mm Glass Vacuum Filter Holder / without Flask, with 300㎖ or 500㎖ Glass Funnel with Fritted Glass- or Stainless-steel Screen Support 진공여과장치/홀다, 여과병은 별도